RE: regression due to r187199 explow.c? in target ia64-hp-hpux11.23.

["Mailaripillai, Kannan Jeganathan" <kannanmj at hp dot com>]

Hi Tristan,

> > http://gcc.gnu.org/ml/gcc-patches/2012-05/msg00970.html
> I have not applied this patch. I will give it a try.

This patch is not fixing the issue. 
Moreover, on compiling expr.c I get this warning:
  ..../gcc/expr.c: In function 'expand_expr_addr_expr_1':
  ..../gcc/expr.c:7603:10: warning: 'result' may be used uninitialized in 
  this function.

For the same testcase, now the ICE is happening in different place (while 
compiling the same line of code):
  test.c: In function 'main':
  test.c:5:7: internal compiler error: Segmentation fault
     boo (&iarr[1]);
       ^

---- Stack trace got through gdb:

Program received signal SIGSEGV, Segmentation fault
  si_code: 2 - SEGV_ACCERR - Invalid Permissions for object.
0x6c9dd60:1 in adjust_address_1 (memref=0x6544a140, mode=SImode, offset=-4,
    validate=1, adjust=1)
(gdb) bt
#0  0x6c9dd60:1 in adjust_address_1 (memref=0x6544a140, mode=SImode,
    offset=-4, validate=1, adjust=1)
#1  0x957a110:0 in gen_lowpart_general (mode=SImode, x=0x6544a140)
#2  0x6ee33e0:0 in convert_modes (mode=SImode, oldmode=DImode, x=0x6544a140,
    unsignedp=-1)
#3  0x6dbc600:0 in convert_memory_address_addr_space (to_mode=SImode,
    x=0x6544a140, as=0 '\000')
#4  0x6f39a60:0 in expand_expr_addr_expr_1 (exp=0x6544a140, target=0x0,
    tmode=SImode, modifier=EXPAND_NORMAL, as=0 '\000')
#5  0x6f3ad50:0 in expand_expr_addr_expr (exp=0x65453678, target=0x0,
    tmode=SImode, modifier=EXPAND_NORMAL)
#6  0x6f67f90:0 in expand_expr_real_1 (exp=0x65453678, target=0x0,
    tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
#7  0x6f3c700:0 in expand_expr_real (exp=0x65453678, target=0x0,
    tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
#8  0x5d4dda0:0 in expand_normal (exp=0x65453678)
#9  0x5d8dce0:0 in precompute_register_parameters (num_actuals=1,
    args=0x7fffd8a0, reg_parm_seen=0x7fffdc88)
#10 0x5da2160:0 in expand_call (exp=0x6544a258, target=0x0, ignore=1)
#11 0x6f637c0:0 in expand_expr_real_1 (exp=0x6544a258, target=0x0,
    tmode=VOIDmode, modifier=EXPAND_NORMAL, alt_rtl=0x0)
#12 0x5f6d760:0 in expand_call_stmt (stmt=0x6545c0b0)
#13 0x5f6da90:0 in expand_gimple_stmt_1 (stmt=0x6545c0b0)

Testcase, GCC configuration, etc in the original post:
http://gcc.gnu.org/ml/gcc/2012-05/msg00371.html

Regards,
Kannan

-----Original Message-----
From: Mailaripillai, Kannan Jeganathan 
Sent: Wednesday, May 30, 2012 2:44 PM
To: 'Tristan Gingold'
Cc: gcc@gcc.gnu.org
Subject: RE: regression due to r187199 explow.c? in target ia64-hp-hpux11.23.

Thanks Tristan. I have not applied this patch. I will give it a try.

Regards,
Kannan

-----Original Message-----
From: Tristan Gingold [mailto:gingold@adacore.com] 
Sent: Wednesday, May 30, 2012 1:46 PM
To: Mailaripillai, Kannan Jeganathan
Cc: gcc@gcc.gnu.org
Subject: Re: regression due to r187199 explow.c? in target ia64-hp-hpux11.23.

Hi,

did you try with this patch:

http://gcc.gnu.org/ml/gcc-patches/2012-05/msg00970.html

Tristan.

On May 29, 2012, at 12:23 PM, Mailaripillai, Kannan Jeganathan wrote:

> Hi,
> 
> This modification (assertion) is causing failure in ia64-hp-hpux11.23:
> 
> r187199 | rsandifo | 2012-05-05 10:41:49 -0700 (Sat, 05 May 2012) | 247 lines
> Changed paths:
>   M /trunk/gcc/explow.c
>   * explow.c (plus_constant, plus_constant_mode): Likewise.  Assert that 
>     the mode is sensible.
> 
> Haven't analyzed the issue. Thought of checking, if it is a known issue.
> 
> Error:
> ------
> test.c: In function 'main':
> test.c:5:7: internal compiler error: in plus_constant, at explow.c:88
>   boo (&iarr[1]);
>       ^
> 
> Testcase (test.c):
> ------------------
> int iarr[2];
> extern int boo(int *);
> 
> int main(void) {
>  boo (&iarr[1]);
>  return 0;
> }
> 
> Compilation command: 
> --------------------
> gcc -c test.c
> ^ This compiler is built out of revision 187199 (trunk). Error attached above.
> 
> Configuration:
> --------------
> COLLECT_GCC=.../build-ia64-hp-hpux11.23-trunk/obj_gcc/gcc/xgcc
> Target: ia64-hp-hpux11.23
> Configured with: ...gcc/src/configure --host=ia64-hp-hpux11.23 
> --build=ia64-hp-hpux11.23 --prefix=.../gcc-ia64-hp-hpux11.23-trunk \
> --with-local-prefix=.../gcc-ia64-hp-hpux11.23-trunk --disable-nls \
> --with-gmp=.../ia64-hp-hpux11.23 --with-mpfr=.../ia64-hp-hpux11.23 \
> --with-mpc=.../ia64-hp-hpux11.23 --with-libelf=.../ia64-hp-hpux11.23 \
> --disable-libmudflap --enable-libunwind-exceptions SED=/usr/bin/sed \
> --enable-languages=c,c++,fortran
> Thread model: posix
> gcc version 4.8.0 20120505 (experimental) (GCC)
> COLLECT_GCC_OPTIONS='-B' '/.../build-ia64-hp-hpux11.23-trunk/obj_gcc/gcc/' '-c' '-v'
> GNU C (GCC) version 4.8.0 20120505 (experimental) (ia64-hp-hpux11.23)
> compiled by GNU C version 4.5.1, GMP version 4.2.4, MPFR version 2.4.1, MPC version 0.8
> GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
> 
> Regards,
> Kannan
>